Dynamo-electric machine.



No. 682,898. Patented Sept I7, I901.

'0. DE W. ANDERSON.

DYNAIO ELECTRIC IACHINE.

(Applicltion filed Oct. 22, 1900.) (No Model.) 2 Sheets-Sheet l.

m; m: mm: m, maraumo. mmmm. mp.

Patented Sept. l7, I901.

0. DE w. ANDERSON.

DYNA'O ELECTRIC IACHINE. v

(Application filed Oct. 22, moo.)

2 Sheets-Shani 2.

(No Model.)

embodying the invention.

- UNITED STATES P TENT OFFICE.

CHARLES DE \VITT ANDERSON, OF CHICAGO, ILLINOIS.

DYNAMO4ELECTRIC MACHINE.

SPECIFICATION forming part Of Letters Patent N0. 682,898, datedSeptember 17, 1901.

Application filed October 22 1900. Serial No. 33,881. (No model.)

To all whom it may concern:

Be it known that I, CHARLES DE WITT AN- DERSON, a citizen of the UnitedStates, residing at Chicago, in the county of Cook and State ofIllinois, have invented certain new and useful Improvements inDynamo-Electric Machines, of which the following is a specification.

The present invention relates principally to motors, and especially tothat class of motors that are adapted for use on motor-vehicles; butsome features of it are equally applicable to generators.

The principal object of the invention is to improve the construction ofwhat are known in the art as hub-motors, by which is meant a motorassociated with the hub of the groundwheel of a vehicle.

A minor object of the invention is to improve generally the constructionof dynamoelectric machines of the broad class first above indicated.

To these ends the invention consists in the features of novelty that areherein described, and in order that it may be fully understood I willdescribe it with reference to the accompanying drawings, which are madea part of this specification, and in which- Figure l is an axial sectionof a hub-motor Fig. 2 is a transverse section thereof on the line 2 2,Fig. 1.

A represents the axle, and B a removable sleeve which surrounds the axleand is prevented from turning thereon by means of keys a, one of whichis'held in place by means of a flanged cap a, screwed onto the inner endof the sleeve, and the other of which is held in place by a plate a,secured to the end of the axle by means of a tap-bolt A, which plate andbolt also prevent the longitudinal displacement of the sleeve. The outerportion of the sleeve is threaded exteriorly, as shown at Z), and ontothis threaded portion are turned rings C C,which form the inner racesfor antifriction-balls D, the outer races E for said balls being carriedby the hub F of the groundwheel. The present invention is not concernedwith the spokes and outer portion of the wheel, and these may thereforebe of any desired construction.

One of the principal features of the invention consists in a hub havingon its inner end within the plane of the spokes a flange G, to which thepropelling power is applied and to which the casing H of the motor issecured. In hub motors as heretofore constructed the spokes have beensecured directly to the motor-casing approximately at its mid-length;but this is open to many objections, one of which is that the severetorsional strains to which the ground-wheel is subjected break andotherwise injure the motor-casing. Another objection is where the casingenters into the construction of the Wheel and forms, in fact, its hubany injury to the wheel necessitating its removal necessitates also theremoval of the casing. These objections are not, however, present in ahubmotor in which the wheel and its hub are separable from the balanceof the casing. This arrangement relieves the casing of the strains towhich the wheel is subjected, said strains being taken up by thewheel-bearing, and at the same time it enables the wheel to be removedeither for the purpose of repairing it or for replacing it with one ofdiiferent diameter without disturbing the casing or other parts of themotor proper.

At its inner end the sleeve B is threaded, as shown at b, and onto thisthreaded por tion is turned a ring I, on which is formed the inner racefor the series of balls J, the outer race J for said balls being securedwithin an annular rabbet in the inner end of the casing The ring I has asleeve-like extension 6, which projects through the opening in the innerend of the casing,and its projecting portion is made non-circular orprovided with other suitable features for the reception of a wrench orother tool whereby it may be turned for the purpose of adjusting thering Land thereby adjusting the bearing.

L is a sleeve disposed within the casing H and rotatively mounted uponthe sleeve B through the medium of antifriction-bearings M. This sleeveL is threaded at its ends, and on it an armature N is built orconstructed in the manner shown and described in my application filedAugust 27, 1900, Serial No. 28,154.

Upon one end of the sleeve L is non-rotatively secured a ring 0, havingan annular rabbet for receiving the outer bearing ring or cup m of thebearing M and having also a already referred to.

series of gear-teeth 0, adapted to mesh with a gear-wheel P, whichlatter meshes also with a series of gear-teeth g, carried by the flangeG. The gear-wheel P is supported through the medium of anantifriction-bearing by a stud Q, carried by an arm Q, non-rotativelymounted upon the axle A through the medium of a ring Q" and thebearing-ring 9!, As before described, the sleeve B is incapable ofrotating relatively to the axle A, and the ring 0 when once adjusted toproper position is nQn-Iotatively connected to the sleeve B by means ofa pin or other suitable device, the ring Q'1 being in turnnon-rotatively secured to the ring 0 by similar means. With thisarrangement the sleeve L, carrying the armature N, and the casing H,carrying the field-magnets H,

will be caused to rotate in opposite directions.

R R R are brush-rings, and S S S are brush-rings, all of which aredisposed Within an annular recess in an extension H of the easing, thering R R B. being of smaller diameter and disposed within and oppositethe rings S S S leaving between the two sets of rings an annular spacefor the entrance of the brushes T, These brushes may have contact withthe outer faces of the rings R R B or with the inne aces f the ings S .8S

according to the course which it is desired the, current shall take.pled With the sections of the commutator U and with the coils of thefield-magnets H. The connections are not shown in, the drawings, for thereason that they form no part of the present invention, and,furthermore, will vary according to the'type of the machine. Suffice itto say that the connectione between the ings and the appropriate.field-magne coils may be direct, since both the. rings and the coils arecarried by the casing, while thecomlection between the rings and thecommutator-sect s w l be th ough the medium of properly-arranged brushessupported by bracket-arms H on the interior of the casing, one of saidbrushes being shown at u. The

stems of the brushes T are insulated and are supported by means of adisk V, carried by the Sleeve B, the electrical connection with thesource of electricity being made at the inner ends of the brush-stems.

In order to hold the brush-rings in place and close the annular space inwhich they are located, excepting for an annular opening suflicient toaccommodate the stems of the brushes T, a ring W is secured to the innerextremity of the flange forming the inner wall of the chamber in whichthe rings are located and a sleeve W is screwed onto" the flange formingthe outer wall of said chamber, said'sleeve having an inwardly-presentedflange w,which projects inward and partially closes the annular chamberaforesaid. The sleeve W also projects beyond the plate V and is in closeproximity to the peripherypf Said plate, whereby the brushes and theirrings are in.-

he ri gs are eonclosed and protected from dust and dirt. Thisarrangement of, parts also prevents dust and dirt from entering thebearings.

The casing H is round in cross-section, and at about its mid-length itis provided with a cylindrical surface X for receiving the band ofa'brake.

Having described my invention, what I claim as new therein, and desireto secure by Letters Patent, is-

1. In a hub-motor, the combination with an axle and a' wheel having ahub journaled upon the axle, of a motorhavingacasing surrounding andjournaled upon the ax1e,'the outer end of the casing being attached tothe wheel, substantially as set forth.

2- .A hu -motor havi g n axle a d a Wh ha i g a. hub ionrnaled n the ale, n comhinatioh wit a motor hav g a casing u rounding and jour a edpon the. ax e, and means for d taohah y connect ng the outer end of thesing an the wheel, su s ant a ly as set forth.

3 A hub-motor ha ing an a e nd a whee having a b iour ale upon th le,Said ub hav ng at ner end an annu a fla ge i combi ation wit a ca groundi and journaled upon the axle, and means for detaohahly connecti gthe outer en o the casing to the ange of th hnh,sobstantie y as set o tA hub-motor h ving a a leand a whee having a hub journaled upon the axleand a g at. its nner end aanse, in QQmbinat o w th a ca i g su roundi gand iou a e upon t e a le and hav ng s o ter end d tachably secured tothe flange aforesaid, which latter and the hub form the outer end o thecasing, ubs a tially as s t forth-J e n a hub-m to th combination of anax a removabl Sleeve surrounding t, means, for p eventing t e e a ive roation of the e a d sl e e, a wheel aving a h jo naled upon th sl eve, ad motor ha ing a as ng ionrnaled uponth sle vowhere by the enti e mo rand el may he rem v w th the sleeve, substa t a ly as s forth. I

6. A huh-m tor havingdn combination, a axle, sle ve surrounding he axle,means or p eventing the relativ otation f. the axle nd s ee e, a wheehaving a hub iou nailed upon the sleeve, 2, motor hav ng a one 111:;journaled upon the s eev and having it outer end detachably connected tothe. Wheel, where y the Wheel may be emove Without removing the casing,a second leeve journale upon the rst. and remova le independently theeof; an n a mature arried by the second sleeve, other parts of the motorbeing ca ried by h sleeve rs a s id; s hstan daily as set forthn a ylectric mach ne, the combination of a revoluble casing, a plurality ofbrush-rings arranged concentrically and with an annular space betweenthem, means for.

insulating said rings, and brushes occupying the annular space aforesaidand having contact with the rings, substantially as set forth.

8. In a dynamo-electric machine, the combinationot' a revoluble casinghaving an annular recess, a plurality of brush-rings arranged in saidrecess-one within another, with an annular space between them, brushesprojecting into said annular space and having contact with the rings, adisk by which 10 the brushes are supported, and a flange carried by thecasing and projecting over the periphery of the disk, substantially asset forth.

- CHARLES DE WITT ANDERSON.

Witnesses:

L. M. HOPKINS, J. H. LEWIS.

